题目

Good relationships are definitely good sources of happiness in life. We all want happy relationships but if we do not keep that relationship alive, it can also be one of the most distraught things in life. There may be no hard and fast rules in making good relationships, as each of us has different preferences and points of view as to what is a great relationship. The following are some major key points in making relationships work.It is often said that building good relationships is all about communication. Good communication indeed governs a good relationship — knowing the right thing to s把一副三角板如图甲放置，其中， ， ，斜边， ，把绕点顺时针旋转得到（如图乙），这时与相交于点，与相交于点．（）求的度数．（）求线段的长．（）若把绕点顺时针旋转得到，这时点在的内部，外部，还是边上？证明你的判断．